In Delacon's call tracking solution, CID stands for campaign or company ID and is a unique identifier for a single tracking number or a pool of tracking numbers. It sometimes is also referred to as Service ID. The ID is used in the tracking code and to map various integrations.
The CID number for each of the campaigns can be found in the Delacon portal on the left hand side of the screen by clicking on Services > List Services or by clicking on this direct link: https://pla.delaconcorp.com/siteui/services/listservice
This will direct you to an overview of all the campaigns you have running. Under the Service ID column, you will find the unique ID for each campaign.